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Hyaena Brunnea) in Shamwari Game Reserve, Eastern Cape, South Africa

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Hyaena Brunnea) in Shamwari Game Reserve, Eastern Cape, South Africa Page 1 of 5 Short Communication The diet of brown hyaenas (Hyaena brunnea) in Shamwari Game Reserve, Eastern Cape, South Africa Authors: Brown hyaenas (Hyaena brunnea) were introduced to Shamwari Game Reserve in the 1 Kerry Slater Eastern Cape Province during 2002, but their feeding ecology is poorly understood. Feeding Konrad Muller2 observations of brown hyaena by field guides and the collection of 31 scats from the study area Affiliations: took place over an 11 month period. Standard techniques were used to analyse the scats and 1Department of identify prey items present. Ten dietary categories were identified from the scats, with a mean Environmental Sciences, of 3.2 dietary categories per scat. Large mammal remains were found in 30 of the 31 scats, with University of South Africa, South Africa kudu being the most abundant (61.0% of scats). Overall the two methods indicated at least 14 mammal species being fed on by the brown hyaena. The presence of mainly large mammal 2Shamwari Game Reserve, remains and invertebrates (in 38.7% of all scats), together with the feeding observations of Eastern Cape, South Africa mainly large mammals by field guides, suggests that brown hyaena in Shamwari are mainly Correspondence to: scavengers and that sufficient carrion is available, thereby reducing the need for them to hunt. Kerry Slater A 52.0% occurrence of plant matter was found in the scats, suggesting that plant material is an important component of their diet. Further studies are underway to investigate the feeding Email: ecology of brown hyaena in Shamwari and surrounding areas. [email protected] Conservation implications: Comprehensive scat analysis over a number of years, monitoring Postal address: of individual movement patterns and population numbers of brown hyaena in and around Private Bag X6, Florida 1710, South Africa conservation areas will be beneficial in quantifying resource use of this species. Dates: Received: 05 Feb. 2013 Accepted: 18 Sept. 2013 Introduction Published: 28 Feb. 2014 Investigating the diet of free-ranging animals provides information of resources available to and utilised by these animals, but this information is not always available to wildlife area managers How to cite this article: because of constraints on time-consuming field work. The diet of a carnivore is a reflection Slater, K. & Muller, K., 2014, ‘The diet of brown of its feeding type (specialist or opportunistic), the availability of its potential prey and its hyaenas (Hyaena brunnea) morphological, behavioural and physiological adaptations (Kok & Nel 2004). in Shamwari Game Reserve, Eastern Cape, South Africa’, Previous studies on brown hyaenas (Hyaena brunnea) have shown it to have a diverse diet and, Koedoe 56(1), Art. #1143, although primarily a scavenger of mammals, it also forages for insects, reptiles, birds and their 5 pages. http://dx.doi.org/ eggs, and plants (Burgener & Gusset 2003; Kuhn, Wiesel & Skinner 2008; Maude 2005; Mills 10.4102/koedoe.v56i1.1143 & Mills 1978; Owens & Owens 1978; Skinner 1976; Skinner & Chimimba 2005; Skinner & Van Copyright: Aarde 1981; Van der Merwe et al. 2009). Despite being generalist feeders, they appear to lean © 2014. The Authors. towards specific prey items depending on their habitat. For example, in the southern Kalahari, 58 Licensee: AOSIS different food types were identified in faecal samples (Mills & Mills 1978), but along the Namib OpenJournals. This work Desert coast, the bulk of the brown hyaena’s diet is Cape fur seals (Arctocephalus pusillus) (Goss is licensed under the Creative Commons 1986; Kuhn et al. 2008; Siegfried 1984; Skinner & Van Aarde 1981). Brown hyaenas are inefficient Attribution License. predators and food obtained by hunting is rare (Mills & Mills 1978). In the southern Kalahari, only 4.7% of hunting attempts were successful and those vertebrates hunted successfully made up only 4.2% of the total vertebrate diet (Mills 1978). Vertebrates hunted were also of small sizes and included birds such as korhaan (Eupodotis sp.), small mammals such as springbok lamb (Antidorcus marsupilis), springhare (Pedetes capensis), striped polecat (Ictonyx striatus) and bat- eared fox (Otocyon megalotis) (Mills 1990). Along the Namib coast, between 2.9% (Goss 1986) and 9.6% (Wiesel 2010) of the Cape fur seal pups eaten were killed by the brown hyaenas themselves. In areas where brown hyaena ranges overlap with agricultural lands (Skinner 1976; Skinner & Van Aarde 1981) or human settlements (Kuhn et al. 2008), remains of domestic dogs, cats, cattle, goats, sheep, horses and donkeys (Maude 2005) have been found in their faecal scats. Brown hyaenas are sparsely distributed over the arid and semi-arid regions of southern Africa (Mills & Hofer 1998). Owing to the shy behaviour of this animal, only a handful of papers report on their diet and are mainly restricted to arid areas. There is therefore generally a lack of this Read online: information in most of their distribution range. Scan this QR code with your smart phone or During the early 1990s, the Eastern Cape Province transformed large areas of agriculture to more mobile device economically viable game farming, ecotourism and conservation areas (Hayward et al. 2007). to read online. This change in land use led to numerous wildlife species being reintroduced to former domestic http://www.koedoe.co.za doi:10.4102/koedoe.v56i1.1143 Page 2 of 5 Short Communication livestock farms. These reintroductions included large hair was removed from the slide leaving the imprint of the predator species that had historically occurred in the eastern hair’s scale on the slide. Each hair sample was placed into Cape region, with the main aim of these reintroductions the front section of a Pasteur pipette. Wax was melted and being to restore ecological integrity, conserve threatened sucked up into the pipette and then dipped into cold water species and maximise ecotourism (Hayward et al. 2007). to solidify the wax. A cross-section of the hair was made by Although translocation of large carnivores is common, there cutting the front end of the pipette into small slices with a is often very little or no post-release monitoring (Hofmeyer surgical blade. The size and shape of the medulla and cortex & Van Dyk 1998). of each cross-section, together with the scale imprints, were used to identify mammal species represented in each sample Research method and design from reference material (Keogh 1983; Maude 2005; Perrin & Campbell 1980). Samples from mammal species occurring in Study area the reserve were also used to make up a reference key (see This article describes a preliminary study on the diet of Appendix 1). Remains of insects, reptiles, fruit, bone, hair, brown hyaenas at Shamwari Game Reserve in South Africa’s feathers and any other objects were identified by manually Eastern Cape Province (33°25′40′′S, 26°05′32′′E). Shamwari sorting through the faecal scats. is approximately 25 000 ha, traversing four geological formations (i.e. Bokkeveld series shale, Witteberg quartzite, Dietary diversity (H) was calculated from the scats using Karoo sandstone and Sundays River formations) (O’Brien the Brillouin index and the cumulative diversity (Hk) was 2004). Vegetation types in Shamwari include: Kowie Thicket, plotted against the number of scats to determine if the brown Bhisho Thornveld, Suurberg Quartzite Fynbos and Suurberg hyaenas diet had been adequately sampled (Glen & Dickman Shale Fynbos (Mucina & Rutherford 2006). Shamwari 2006). The percentage occurrence of each prey item or species in is situated in the spring-dominant rainfall region of the the total number of scats was calculated as an indication of province and receives about 550 mm of rainfall per annum (Low & Rebelo 1996; Stone, Weaver & West 1998). Permanent Feeding observations water is available in the semi-perrenial Bushman’s River that Main roads flows through the reserve for 27.6 km and there are a number Bushmans river of small earth dams. Shamwari boundary Carnivores that have been reintroduced to Shamwari include cheetah, leopard, lion, serval, African wild dog and brown hyaena. Historical records indicate that brown hyaenas had not been seen in the eastern Cape region since the 1960s Bushmans river (Hayward et al. 2007). During 2002, two adult male and four adult female brown hyaenas wild caught from Northern R342 Cape Province farms were reintroduced to the reserve and, N10 by 2004, an estimated population of 15 hyaenas could be N2 found in Shamwari. During 2007, seven adults and sub- adults were relocated from Shamwari to other Eastern Cape N reserves. Despite this apparent success of reintroducing 10 km brown hyaenas into Shamwari, no detailed study on their diet has been conducted. FIGURE 1: Locations of brown hyaena feeding observations by field guides in Shamwari Game Reserve, Eastern Cape Province during the study period, from Procedure April 2008 to June 2009. Data on feeding observations of brown hyaenas documented by field guides whilst out on game drives with guests were Latrine locations collected between April 2008 and June 2009 (Figure 1). These Main roads recordings included the date, species being fed on, size and Bushmans river any other related information. Thirty-one fresh faecal scats Shamwari boundary were also collected from 11 latrines throughout the study area between April 2008 and May 2009 (Figure 2). Dried scats were placed into a nylon netting envelope and rinsed with Bushmans warm water to loosen the hair and other objects trapped inside. river The scats were dissected manually and all hair samples R342 were removed. A representative sample was selected for N10 analysis by inspecting all the hairs visually from each faecal N2 scat and selecting at least one hair for each size, thickness, shape, colour and length (Maude 2005). This increased the N chances of identifying all mammal species represented by 10 km hair in each faecal sample. A scale imprint was made of each FIGURE 2: Locations of brown hyaena latrines used for faecal scat collection in hair sample by placing the hair onto a glass slide that was Shamwari Game Reserve, Eastern Cape Province during the study period, from covered with liquid gelatine.
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